Is it the front or rear cameras? Do you have an example to show? My Note 20 Ultra had quite a shallow depth of field effect when capturing something close up with the rear camera. But normally it was fine. Have you tried removing the case and seeing if you get the same thing? Some cases can affect results with reflections or being too close around the cameras and sensors. Or screen protector if its the front camera
Yes that's the sort of thing my Note 20 Ultra did. It focuses on the part nearest to the camera to get it as sharp as possible. The natural affect is the blurring of the background. On DSLR cameras, it's a natural bokeh. Basically what the phones camera is doing. Unfortunately with phones, you don't have a variable apature to reduce this. There are editing apps out there that you can take two or three shots and tap to focus on different parts. Then use and app to focus stack them to get an overall sharp image.
Maybe someone here can recommend one. Not had a go doing this on a phone.
I use a few phones, but the S23 Ultra and Z Fold 4 are two of my daily devices. Yes the S23 Ultra does the same thing. I think because developers are trying to get that DSLR experience with the cameras and I think the Samsung sensor is larger than the iPhones. I'm not on about Mp amounts. The bigger the sensor the more you get that natural bokeh effect. I do like the look of it like that personally, but I can see others that won't be as keen on it